So far there’s been a lot of speculation about the Canon mirrorless camera, which is due this month, having the same sensor as the G1X. This would be pretty disappointing as the sensor in that camera is based on 3 year old technology with a slow readout so the video mode was rather poor.
Now the word on the street according to Canon Watch is that Canon are (sensibly in my view!) opting for an APS-C sized sensor in the new camera, making it a better match to their EFS lenses which can be used via an adapter. The mount could also form the basis for a lower end pro video offering as APS-C is approximately Super 35mm sized in the film world.